Add `no-stack-protector` feature flag #160

Job	Run time
macOS	24s
rustfmt	9s
Windows	1m 32s
Linux (default features)	17s
Linux (all features)	29s
Linux (minimal)	16s
Linux (!std + decoder)	15s
Linux (encoder)	17s
Linux (!std + full-decoder + encoder + formatter)	19s
	3m 58s

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